Roll-grinding machine



March 16 1926.

J. F. FLAHEFTY ROLL GRNDING MACHINE l 20, 7 Sheets-Sheet l Filed July l2J. F- vFlJl-l-EF''Y RoLdGRlN-DING MACHINE March 16 i, 1926. v

Filed July 12, 1920 7 Sheets-Sheet kill..

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J. F. FLAHERTY ROLL GR1ND1NG MACHINE a Filed Jlly 12T 1920 TsheetS-sheet4 March' 16 1926. v 1,576,589

J. F. FLAHERTY 7 ROLL GRINDING MACHINE Filed July l2, 1920 7Sheets-Sheet 5 l lwoo/11 boa Zim-HE' FLAHERTX March 16,1926. wwwa" J. F.FLHEFY''Y ROLL GRINDING MACHIN @ww/m to?, Jfmf FFLAHEHTY.

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March 16 192( L57539 J. F. FLHERTY ROLL GRINDING MACHINE Filed July l2,1920 7 Sheets-Sheet '7 Patented Mar. i6, lh.'

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JOHN F. FLAHERTY, F TOLEDO, 01H10, ASSIGNOR TO THE BUCK BEARING CGMPANY,0F TOLEDO, OHIO, A CORPORATION OF OHIO.

ROLL-GRINDHIG MACHINE.

Application filed July 12, 1320. Serial No. 395,539.

TovaZZ 'whom t may concern.'

Be it 'known that l, JOHN FLAHERTY, a citizen of the United States, anda resident ot' Toledo, county of Lucas, State of Ohio, have invented newand useful improvements in Roll-Grinding Machines, of which thefollowing is a specilication.

This invention relates to grinding machinos and has for its principalobject the provision ot a machine adapted to securely grindan endsurface on an elongated article, such as `a tapered roller for an anti-'lrictio'n bearing.

A further object is to provide a machine capable oi grinding a beveledor spherical surface on the end ojt an article.

A further object is to provide a machine oi' this type with a wheeldressing` device, adapted to he quickly and conveniently operated. totrue up the grinding` wheels.

A. further object is to provide an improved 'work-holder, whereby thework may be accurately positioned and held.

A further object is to provide a machine that can be economicallymanufactured and operated and which will be subject to very.

slight wear and provided with convenient adjustuients` whereby any wearthat may occur can be compensated for, so as to have the machine operateaccurately over long periods.

Other objects of the invention and the features oi novelty will beapparent from the following description, taken in connection with theaccomi'ianying drawings', in which Figure l is a side elevation of amachine emlwdying my invention; l

Fig. Q is an elevation ofthe right-hand end ot the machine us seen inFig l, certain parts 'oclug shown in section;

'Fig I-i is a plan 'View of the machine; i Fig. 4 is a longitudinalsection substantially on the line ot Fig. 2;

Fig. is a transverse section on the line 5-5 ot F 2; l

Fig. 6 is a transverse section on the line (3--6 ot Fig. 3i

Fig. 7 is a horizontal section on the line 7-7 ot Fig. 2;

Fig. 'S is a side elevation ot one of the cams as seen from theplane 8-8of Fig. 7;

Fig. 9 is a side elevationv of another cam as seen from the plane 9-9 otFig. 7;

Fig. 10 is a detail plan of the oscillating mechanism for thework-holder as seen'from the plane lO-lO of Fig. 6;

Fig. l1 is an enlarged section of the work-holder, the section being onthe line t--G but looking in the opposite directie from the arrows;

Fig. l2 is a fragment ot Fig. l; and

Fig. 13 is an enlarged section on line ia-ia of Fig. 3.

Referring to the drawings, 2O indicates the bed or frame ot' themachine, on the top ot which ways :2l and 22 are provided for thereciprocating carriage 2?). IThe Way 22 is preferably of the Vtype,.asis common in machine tv ool construction, so as to preveut lateraldisplacement of the carriage. Av shait 24 is arranged in bearings 25, 26and 27 in the lower part of the bed 20 and carries a barrel-cam 28 withWhich'the roller Q9 on the lower end of the leverB() cooperates. Thelever 30 has its upper end keyed to a shalt 31 mounted in bearings 32and in the bed Q0. The shaft 3l also has keyed thereto an upwardlyextending arm 84 at the top ot' which is a gear sectorv 35 which mesheswith a rack 3G on the carriage 25. The rack 36 is adjustable on thecarriage by means of a screw 37 on the shalt 38, the shaft being mountedin bears ings 39 and 40 on the carriage 23 and being held against axialmovement in one direc-h tion by the collar 41, but having va. slightmovement in the opposite direction, by Virtue ot the spring 4Q whichbears on the mit 43 on the end of the shaft 38. A. gear 44 is mounted onshaft 38 and meshes with a pinion 45, on a short shaft 46, the exposedends ot' the shafts 38 and 46 being'made square, to receive a wrench forturning these shafts. By applying the Wrench directly to the shaft 38,the rack 36 may be quickly traversed with reference tothe carriage 23,while by applying the Wrench to the shaft 4G, the ratio of the gears 44and 45` enables a very fine adjustmentof the rack 36.`

rlhe bed 20 has an opening 47 opposite the cam 28 to permit access tothe latter, and this opening is normally closed by a door 48. Keyedtothe shaft 24 `is a gear 49. which is drivin by a pinion 50cm the shaft51 which is mounted in bearings 52 and 53 and also has arranged thereona gear 54. A pinion 55, on the` shaft. 56,'.

meshes with the gear 54 and the late ter. The shaft 56 is mounted inbearings 57 and 58, and is adapted-to he driven hy a pulley 59, througha clutch 00, nl suitable construction. 4lever 61 on the ei:-

terior ofthe bed 20 is secured 'to the shaft 62 and is ada ted toactuate the clutch 60 through the inkage 63, which may be of anypreferred type.

A pinion 64 (see Fig. 6), is mounted on a shaft 65and meshes with. thegear 49. The shaft also carries a bevel geur 66, which meshes with agear 67 on the vertical shaft 68 which is geared to a shalt 69 by a airof bevel gears 70. The shaft S9 is mounted in a bearing 7l and has itsouter end `squared toreceive .e Wrench, whereby the vshaft 24 may berotated to traverse the cargagement without undue straining ofthe.mechanism Which reciprocates` the carriage. 23, 'the Aspring42,-previonsly described, isv

provided, which permits a slight movement ofthe rack 36, after the'movement ot the 'carriage has been .interrupted hy tie stop 75. Thecarriage 23 carries onits under side., Withinthe bed 20,2J bracket77,21', the lower end of which is a bearing 78 for the vertical shaft79, the upper end of'this shalt hein supported by a bearing-.80, whichis mounts o in the block 81 secured to the upper side of the carriage23. Secured on the upper end I of the shaft 79 is a bracket 82 on whicha hourjsing 83'is slidably mounted, by means of [the dovetail` 84.' Ahollow spindle 85 is mounted in 'hearings 86 Vand 87 in the housing' 83and. has

a? extension 88 threaded into cne'end thereo .I The opposite end of thespindle 85 is enlarged, to provide a thrust shoulder which bears againstone end of the hearing 86 and cooperates With a thrust collar 90 which'is held on the spindle by means of the vnuts 91 and 92 and which engagesthe end of the bearing 87, to hold the spindle against axial movement ineither direction. A dowel y 93 connects the thrust collar 90 with thenut 91 so as to cause the thrust collar with the spindle.

The bearings 86 and 87am adjustable for to rotate wear so as to hold thespindle 85 against latl eral movement and, veline any suitable means ofadjustment may he used, rte; use the construction illusl which isclaimed in my eci-ipe:

'connection at 107 therewith.

trecce the housing 83, tol hold the bearing against axial movement inone direction. The hearm ing is split and in the split is Aprovided aYthreaded opening for the tapered end of the screw plug 95, this screwplug positively holding the hearing against contraction but, upon beingbacked out, will permit a certain amount 'ofcontractiom ovvinf tothetapering. of the end of the screw. T e outer surface of the bearing istapered, as indicated at 96, and has arranged thereon a sleeve 97 thatis provided with va tapered bore and a cylindrical outer surface whichfits the bore 98 of 'the housing 83. The sleeve 97 husa slot 99 throughwhich the screw plug 95 projects and also has one end threaded, asindicated at 100, to receive the nut 101 which hears against a shoulderon the housing 83 `and cooperates with, the shoulder 94 to hold thebearing from axial movement in either direction. The hearing 86 has a'threaded end 102 on which there is a nut 103 which bears against the endof 'the sleeve 97, to hold the latter i against axial movement Vrelativeto the bearing.

The construction just described enables the f hearing 86 to hecontracted on the spindle 85, to compensate for Wear, and to malte thisadjustment, the screw plug 95 is hacked out slightly and the nut 101loosened. The nut 105 is then turned to force the Sleeve 97 onto thebearing to contract the latter, the engagement of the flange on thehearing with the shoulder 94: holding the hearing :gainstexial movementwhen this adjustnie t is made. l.When the bearing has heen contiactedsufficiently, the nut 101 is.

again tigitened and the partsvvill be retained in' their adjustedposition. It will be understood that in making this adjustment, thescrew plugl 95 Will be backed out only such an amount us will permit thercquired adjustment, so that when the adjustment is completed, the screwplug will positively' hold the split in the bearing` With the desiredamount or' opening. A cap 104'; is arranged over the exposed end ofthescrew plug 95 to prevent the latter from being turned accidentally andto prevent dirt from getting into the hearing. Arranged Within thespindle and the extension 88, hut rotatahletherewith, is an axiallyshii'table tubular. member 'or sleeve 105, one end of which. isenlarged, to receive the head 100 which has a screw threaded he head 106has a conical bore 108 which cooperates 'with the, conical exterior ofthe split-collet 109, which is adapted tcreceive the Work A the bed 20and cooperates with the earn 171- on the side of the 119, the cam 174ibeing suitably shaped to reciprocate the slide 165 in synchronisni withthe movements of the other parts of the machine.

A push rod 17 5 is arranged in the slide 165 and is adjustable, withreference to the latter, means ci a threaded connection 176, the'exposed end of the rod being squared to receive a wrench, and alock'nutv 177 being provided to secure the rod in any position in whichit is adjusted. A. carrier 178 for the work is mounted on the arm 179,which is pivoted on the stub shaft 180, on the bracket 153. An arin 131,preferably formed integral with the erin 17 9, carriesa cam roller 182which cooperates with @he cani slot 183, in the bracket 134 on thecarriage The cain slot 183 ,is shaped to cause a rocking movement of thecarrier 178, so that when the carriage 23 is atthe left-hand end of itsstroke (as seen in Fig. 1), the carrier 173 will be in alinement withthe rod 175. At this instant, the cam 171.1L will cause the rod 175 tomore orwardand push thej article ltrom the carrier 17 8 into the collet109. The rod 175 will then be 'withdrawn by the cam 171 and the carrier17 8 will be rocked by the inclined portion of the slot 183 'to' aposition oi rest in'alinenient with the feeder-chute 185,. through-which the articles are received by the inachine. rIhe articles may be'fed by hand, or by any suitable automatic mechanism, to thefeeder-chute 135, and when the carrier 178 is in aliueinent with thechute, the articles will rnove forward, by gravity, into the carrier178, a stop 186 being arranged in connection with the chute to limit theforward movement of the article and to prevent its being forced entirelythrough and out of the carrier 178.

A yoke 137 (see Figs. 1,12 and 6), is pivoted at 188, on the housing,r83, and carries studs 189 which engage a circumferential groove in thecollar 123"whereby oscilla tion ofthe yoke 137 wilg slide the collar'123 to actuate the collet 1 0. 'At the lower end of the yoke. 187,therteis a roller 190 which, during a portion ci eachstroke of thecarriage 23, is arranged in a' slot 191, in the upperend of the lever 192, whereby oscillation of the lever 192 will eielct oscillation of theyoke 187. The lever 192 is pivoted at 193, on the bed 20, and in itsiower end carries a block 194, this block having a pivotal lconnectionwith the lever 192 and carrying a rod 195, which is ad- `iustably heldby means of the nuts .196 on oppositesides of the 'block 194. The rod ispivoted' at 107 to the 'upper end oi an arm 193 on the shaft 199, thisshaft being supported in suitable bearings on the Vinterior oi' the bed20 carrying an erin 200 chine. The o ening of the collet 1.09 occurswhen the wor is in line with the space between the grinding wheels andthe bracket 163, on the movement of the carriage 23 to the left, as seenin Fig. 3, the article being ejected into said :space by the plunger127. It is, of course, essential that the grinding surface 'ofthe-wheels 147 and 143 be kept true, and for this purpose and in orderthat the dressing of the wheels may b e done quickly and accurately,without disturbing the adjustment of the machine, I have mounted on thecarriage 23, alongside the block 80, a bracket 203 on which there is apivot 204, the axisof which is in accurate alinement, in the 'directionof movemento the carriage 23, with the axis of the shaft 79. Thepivo't204 (see 13), carries a bracket 205 in which the shank 206` of ahead 207 is slidably mounted, the shank being secured in any 'position-to which it is adjusted, byl means of set screws 208. The head 207 as aflat bottom surface, indicated at 209which bears against a. iat surfaceon the ledge 210 on the bracket'205. A die* mond 211 is arranged in aholder 212 which is adjustably mounted in the head 207. The bracket 205is provided with a handle' 213, by means of which it may `beiswng bach;andorth, and a latch 214 is arranged for locking the bracket 205 inposition.

When it is desired to dress the grinding wheels 147 and 148, the latch214 is pulled out to. release the bracket 205 which is then swung aroundfrom the position shown'in Fig.' 3 so thatI thev diamond willpass thewheels when the carriage 23 is moved to position the diamond to the leftof the grindin wheels. The bracket 205 is then swung bac into theposition shown in Fig. 3 and latched, and the carriage 23`moved to theright, to dress the wheel 147. The carriage 23 is moved. during thisoperation, by rotatin the shaft 38. Astop 215, in the form o a screwadjustable in an arm216 which is pivoted on the bracket 7 3,v is adaptedto engage the end 217 of the block 72 to position' the diamond fordressing the curved, art of the wheel .118..v Thestop 215 shoulaccurately position the axis of the pivot 204 at the point where theaxis of the shaft 79 is located whenithe work is swung for cooperationwith the wheel 118. With the axis ofthe pivot 201 thus located, thedia-- mond will dress the cur-ved part of the 'wheel to the desiredcurvature. After the dress- 'ing of the Wheels has been completed, the

arm 216 is swung up intothe position 'shown rod 175 is withdrawn. rlibecarriage Lacasse in Fig. 1, and the carriage restored to its originalposition.

'The oscillation ot the shaft 79 is effected by means of a barrel-cam218 on the shaft 24. a roller 21) on the lever 29.0 cooperating withthis cam and elle'ctiug the oscillation of the lever. The lever Q9() ismounted on a pivot 221 on an extension .222 of the bracket 47, and has aslot 225% in its outer end in which a block Q21Y is adapted to slide. Apivot 225 connects the block Q24, with one end ot a lever 226 that iskeyed to the lower end of the shaft 7 9 so that the oscillation ot thislever Will eflect the oscillation oit the sha'tt 79. The opposite end cithe lever is connected by a pivot 227 with one end ol a telescopic link229, the other end otwhich is connected with the arm 77 on bracket 77 byan anchor pivot 229.

1n the operation of the machine, the articles are 'led through the chute185 into the carrier 17 8 when the carriage Q3 is at the right-hand endof its stroke, as seen in Fig. 1. As the carriage moves to the lett, theinclined portion ot the cam slot 183 litts the arm 181 and rocksthecarrier 17S toward the right, so that when the roller is in the upperhorizontal portion ot the cam slot, the carrier 178 will be in alinementwith the rod 17 5 and the tail l78 on the carrier will cover the end otthe chute 185` and retain the articles therein. Vbeu the carriage23,1eaches the lett-hand end ot its stroke, the collet 109 Will. be inalinement with the carrier 17 8, as shown in Fig. 3. The collet 10i)will be open. and, at this instant, the rod 175 will be actuated to pushthe article into the collet against the pressure of the plunger 127. Theend oi the rod 17 is suitably formed to accurately locate the Work andwhere the articles to be ground are bearingr rollers, as shown in Fi 1l,the end ot the rod 175 is preferably shaped, to engage with the marginalportion ot' the end et the article, this being the surface to be ground.The articles are thus accurately and unitormly located in the collet andas soon as they are positioned, the collet `rips them and the 23 thencarries the end of the article across ,the Wheel. 1&7 to grind a centralydat portion thereon. @kt the end ot the stroke of the carriage, thestop 75 will' engagel the surface Q17, to accurately position the axisot the shaft 79.: This shaft is then oscillated to carry thewvork acrossthc curve-d surface ot' the 'Wheel 148, thecarriage 23, in the -meantime, remaining stationary.l At the completion ot' theoscillation ot theshaft 79, the carriage 25 moves toward the lett and when the articleispopposite' the space between the' grinding wheels aud-the vluacltet163, the collet releases the article and. the plungerl'lQT eje-cts itinto tnisspace. ylthe' cycle ot operilihile 1 have described theprinciples et my invention and illustrated one applicationY thereot torgrindin av spherical surface on the end ot an artic, it Will beunderstood that various changes may be made in the details otconstruction, Without departing trom the spirit ot the invention, whichis defined in the appended claims.

Having thus described my invention, what 1 claim is y 1. ln apparatus otthe class described, the combination ot tWo axially spaced grindingWheels, means 'for moving the work parallel to the grinding` tace ot oneof 'said Wheels, and automatically operating means Jfor oscillating theWork 'tor cooperationl with the second Wheel after it leaves the firstWheel.

2. 1n apparatus ot the class described, the combination ot two axiallyspaced grinding wheels, means tor moving the Werl; parallel to thegrinding tace of one ot. said Wheels, and automatically operating meansfor oscillatintni1 the Work about a pivot While being operated upon bythe second wheel.

ln appf'ratus of the class described, the combination ot a plurality ot'grinding Wheels, one ot Which'has a straight grindingv tace and theother of which has a curved grinding tace, and means for automaticallymoving the Work parallel to said straight grinding tace while beingoperated upon thereby and lor oscillating the Worlr about the center otsaid curved tace While being operated upon thereby.

t. ln apparatus ot the class described, the combination ot a pluralityot coaxial grinding Wheels, a carriage movable parallel to the axis otsaid whe-els, an oscillating Workholdcr on said carriage, means forholding said work-holder stationary with respect to said carriage whilethe latter is moving, and autoi'natically operating means toroscillating said Work-holder at the end oit the stroke ot said carriage.Y

5. ln apparatus ot' the class described, the combination ot a pluralityot grinding wheels adapted tor successive operation on the Work, areciprocating carriage, an os cillating work-holder on said carriage,means vfor oscillating said worlcholder at one end ci the stroke ot saidcarriage, means 'for feeding the Work to said holder at`the opposite endci" the strokeof the carriage, and means tor discharging the Work fromthe holder iyhile the carriage is in motion.

6. `lu a (Winding machine, the combination ot a. .ge, a Worlnholder onsaidvcarringe edapted to be swung' about an axis to infoife'the Work ina curved path while being acted upon by a grinding Wheel, a. Wheelandadapt-ed to be 'swung about an axis 'parallel'I to thev anis ot theworlcholder, and

.a 'plurality oi stops cooperating with said ations is tbeuirepeatedwithV another article..

said devia@ ineichangwbly in oparsitive we lation to the grinding Wheel.

'7. In a, grinding machine, the sombination of a caii'iage, arifork-hider on saici carriage adapted t@ be swung abfmt mi :uis to movethe woik in a curved pavh whi@ being acted upon by grinding; Wheel, aWheel-dressing .fievice cn said carriage adapted. babe swung about anaxis parallel to the axis of the Work-holder, and means whereby saincarriage may be accurately po- Sitioned with either of said, axes at thesame point 'to inemhangeably locate said Work- 'hoider or said devia@ in@paint-ive refiian 1D0 the grinding Wheel.

S. i a grinding mahin@ which a W iwldi is momiel '30 swing about anaxisto mov@ the of the Work to be ground in a -mu'vee @wh upon acarriage movabie into and out si? Gpemtive posit-ion in relation to thegrinding whaai, a grinding Wheel-dressing avise upon carriage mounted sas i@ ba -swiiigza'bie upfm mi axis araieLto tha upon which the Wok-hoier swim and spaced ihi'efrom in smbsta'ntallyv t e diiem'zion of ini'iecarriage moticn so that the dressing {1n-oi may be @famed nterchan'eabiy 'with the Wei inider in opemtive re ation to ih@ giin Lg Wheel.

l'ii zestimony whe'eof aiix my signature.

JHN F. FLAHERTY.

